TCF12 Knockout Cell Line (HCT 116)

The choice depends on whether you are studying TCF12 (HEB) as a class I bHLH transcription factor or its emerging roles in colorectal cancer and stem cell biology. The Knockout line is appropriate for asking whether TCF12 is required for E-box-dependent gene regulation, dimerization with class II bHLH factors, or specific developmental gene programs. Overexpression is useful for testing whether elevated TCF12 is sufficient to alter dimerization partner availability or to drive specific transcriptional programs. Important consideration: TCF12 shares substantial functional overlap with E2A (TCF3) and HEB-T variants — single TCF12 knockout may show modest phenotypes if paralog compensation occurs. The EDITGENE Knockout line in HCT 116 is particularly relevant for colorectal cancer research, where TCF12 has been implicated in EMT and metastasis. Rescue with wild-type, dimerization-deficient, or DNA-binding-deficient TCF12 is the standard approach for dissecting structural contributions to function.

Primary applications: • bHLH dimerization studies: co-immunoprecipitation analysis of TCF12 interactions with class II bHLH partners (MyoD family, E2A, others) and class V Id proteins. • E-box binding: ChIP-qPCR or ChIP-seq for TCF12 occupancy at E-box-containing promoters in the absence of TCF12. • EMT and metastasis: epithelial/mesenchymal marker analysis, migration, and invasion assays relevant to TCF12's reported colorectal cancer roles. • Paralog compensation: E2A (TCF3) expression measurement to assess class I bHLH family redundancy. EDITGENE recommends this model for researchers investigating class I bHLH transcription factors, colorectal cancer EMT, and bHLH-mediated gene regulation.

Yes. TCF12 rescue experiments require attention to dimerization and DNA binding: • Construct design: use a codon-modified TCF12 sequence with a small C-terminal tag (FLAG, HA). TCF12 has multiple alternative splice isoforms — choose the isoform appropriate to the experimental context. • Dimerization-deficient rescue: bHLH domain mutations that disrupt heterodimerization with class II bHLH partners separate DNA-binding from partnership-dependent functions. • DNA-binding-deficient rescue: basic region mutations abolish E-box binding while preserving dimerization, enabling structure-function dissection. • Paralog considerations: E2A (TCF3) expression analysis in rescue cells helps interpret class I bHLH family redundancy. HCT 116 transduces efficiently with lentivirus and supports stable rescue line generation; the MSI-high background should be considered in colorectal cancer context studies.